<?php // $Id: reset_form.php,v 1.1.2.1 2007/11/29 14:40:50 skodak Exp $
require_once $CFG->libdir.'/formslib.php';

class course_reset_form extends moodleform {
	function definition (){
		global $CFG, $COURSE;

		$mform =& $this->_form;

		$mform->addElement('header', 'generalheader', get_string('general'));

		$mform->addElement('date_selector', 'reset_start_date', get_string('startdate'), array('optional'=>true));
		$mform->setHelpButton('reset_start_date', array('coursestartdate', get_string('startdate')));
		$mform->addElement('checkbox', 'reset_events', get_string('deleteevents', 'calendar'));
		$mform->addElement('checkbox', 'reset_logs', get_string('deletelogs'));
		$mform->addElement('checkbox', 'reset_notes', get_string('deletenotes', 'notes'));


		$mform->addElement('header', 'rolesheader', get_string('roles'));

		$roles = get_assignable_roles(get_context_instance(CONTEXT_COURSE, $COURSE->id));
		$mform->addElement('select', 'reset_roles', get_string('unenrolroleusers'), $roles, array('multiple' => 'multiple'));
		$mform->addElement('checkbox', 'reset_roles_overrides', get_string('deletecourseoverrides', 'role'));
		$mform->setAdvanced('reset_roles_overrides');
		$mform->addElement('checkbox', 'reset_roles_local', get_string('deletelocalroles', 'role'));


		$mform->addElement('header', 'gradebookheader', get_string('gradebook', 'grades'));

		$mform->addElement('checkbox', 'reset_gradebook_items', get_string('removeallcourseitems', 'grades'));
		$mform->addElement('checkbox', 'reset_gradebook_grades', get_string('removeallcoursegrades', 'grades'));
		$mform->disabledIf('reset_gradebook_grades', 'reset_gradebook_items', 'checked');


		$mform->addElement('header', 'groupheader', get_string('groups'));

		$mform->addElement('checkbox', 'reset_groups_remove', get_string('deleteallgroups', 'group'));
		$mform->setAdvanced('reset_groups_remove');
		$mform->addElement('checkbox', 'reset_groups_members', get_string('removegroupsmembers', 'group'));
		$mform->setAdvanced('reset_groups_members');
		$mform->disabledIf('reset_groups_members', 'reset_groups_remove', 'checked');

		if (!empty($CFG->enablegroupings)) {
			$mform->addElement('checkbox', 'reset_groupings_remove', get_string('deleteallgroupings', 'group'));
			$mform->setAdvanced('reset_groupings_remove');
			$mform->addElement('checkbox', 'reset_groupings_members', get_string('removegroupingsmembers', 'group'));
			$mform->setAdvanced('reset_groupings_members');
			$mform->disabledIf('reset_groupings_members', 'reset_groupings_remove', 'checked');
		}

		$unsupported_mods = array();
		if ($allmods = get_records('modules') ) {
			foreach ($allmods as $mod) {
				$modname = $mod->name;
				if (!count_records($modname, 'course', $COURSE->id)) {
					continue; // skip mods with no instances
				}
				$modfile = $CFG->dirroot."/mod/$modname/lib.php";
				$mod_reset_course_form_definition = $modname.'_reset_course_form_definition';
				$mod_reset__userdata = $modname.'_reset_userdata';
				if (file_exists($modfile)) {
					include_once($modfile);
					if (function_exists($mod_reset_course_form_definition)) {
						$mod_reset_course_form_definition($mform);
					} else if (!function_exists($mod_reset__userdata)) {
						$unsupported_mods[] = $mod;
					}
				} else {
					debugging('Missing lib.php in '.$modname.' module');
				}
			}
		}
		// mention unsupported mods
		if (!empty($unsupported_mods)) {
			$mform->addElement('header', 'unsupportedheader', get_string('resetnotimplemented'));
			foreach($unsupported_mods as $mod) {
				$mform->addElement('static', 'unsup'.$mod->name, get_string('modulenameplural', $mod->name));
				$mform->setAdvanced('unsup'.$mod->name);
			}
		}

		$mform->addElement('hidden', 'id', $COURSE->id);

		$buttonarray = array();
		$buttonarray[] = &$mform->createElement('submit', 'submitbutton', get_string('resetcourse'));
		$buttonarray[] = &$mform->createElement('submit', 'selectdefault', get_string('selectdefault'));
		$buttonarray[] = &$mform->createElement('submit', 'deselectall', get_string('deselectall'));
		$buttonarray[] = &$mform->createElement('cancel');
		$mform->addGroup($buttonarray, 'buttonar', '', array(' '), false);
		$mform->closeHeaderBefore('buttonar');
	}

	function load_defaults() {
		global $CFG, $COURSE;

		$mform =& $this->_form;

		$defaults = array ('reset_events'=>1, 'reset_logs'=>1, 'reset_roles_local'=>1, 'reset_gradebook_grades'=>1, 'reset_notes'=>1);

		if (!empty($COURSE->defaultrole)) {
			$defaults['reset_roles'] = array($COURSE->defaultrole);
		} else {
			$defaults['reset_roles'] = array($CFG->defaultcourseroleid);
		}

		if ($allmods = get_records('modules') ) {
			foreach ($allmods as $mod) {
				$modname = $mod->name;
				$modfile = $CFG->dirroot."/mod/$modname/lib.php";
				$mod_reset_course_form_defaults = $modname.'_reset_course_form_defaults';
				if (file_exists($modfile)) {
					@include_once($modfile);
					if (function_exists($mod_reset_course_form_defaults)) {
						$defaults = $defaults + $mod_reset_course_form_defaults($COURSE);
					}
				}
			}
		}

		foreach ($defaults as $element=>$default) {
			$mform->setDefault($element, $default);
		}
	}
}
